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    Question

    Which of the following isotope of uranium is used as a

    nuclear-fuel in reactors?
    A U237 Correct Answer Incorrect Answer
    B U238 Correct Answer Incorrect Answer
    C U235 Correct Answer Incorrect Answer
    D U233 Correct Answer Incorrect Answer

    Solution

    Uranium 235, the only existing fissile nucleus found in natural uranium, is used as a nuclear fuel in reactors and as an explosive for nuclear weapons. This very rare isotope, present at the concentration of 0.7% in natural uranium, is thus a highly strategic and coveted material.

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